|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.98 | NA |
| 1987 | 1.85 | -6.79 % |
| 1988 | 1.87 | 1.41 % |
| 1989 | 1.90 | 1.28 % |
| 1990 | 2.77 | 46.17 % |
| 1991 | 1.83 | -33.93 % |
| 1992 | 2.73 | 49.18 % |
| 1993 | 1.84 | -32.57 % |
| 1994 | 1.79 | -3.07 % |
| 1995 | 1.84 | 3.23 % |
| 1996 | 1.88 | 1.82 % |
| 1997 | 1.88 | 0.30 % |
| 1998 | 1.89 | 0.37 % |
| 1999 | 1.65 | -12.51 % |
| 2000 | 1.01 | -39.07 % |
| 2001 | 1.16 | 14.85 % |
| 2002 | 1.18 | 2.24 % |
| 2003 | 1.23 | 3.83 % |
| 2004 | 1.31 | 6.42 % |
| 2005 | 2.03 | 55.47 % |
| 2006 | 1.43 | -29.63 % |
| 2007 | 1.35 | -5.55 % |
| 2008 | 1.17 | -13.51 % |
| 2009 | 1.37 | 17.49 % |
| 2010 | 2.34 | 70.20 % |
|
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